Blender Brush doesn´t work in Ocean Modifier
Honestly, i don't know why it does not work, but i have some tips for you.

Fake it 'til you make it:
Do not use your ship to create the waves - it has to much details, too complicated. Just slows down your computer - although i am not sure whether you are working on a render farm, because your blend file is so fully packed and on my macbook i got 0.1 fps with your settings....
So i just build a quick mesh like this to create the waves:



first try out with very simple models/blend - files, whether your &quot;idea&quot;/concept works at all...

test: https://youtu.be/jhXz2EItvZ4
check, works

try to adapt your model in that way....

so i deleted your brush and added the super simple model from 1 to your blend file

added some movement by adding keyframes

-&gt; that's what i learned from this time consuming &quot;session&quot;: copy location does NOT work together with dynamic paint. Don't ask me why. I have no clue. But it works if you animate via keyframes. I guess that's why dynamic paint never worked with your ship because it is also moved via copy location.

result: (of course you should hide the primitive model and tweak the settings so that it is looking good. My waves are shitty, i just wanted to show that it works)

https://youtu.be/qFZQnPT3q9I
and this is how it looks without the &quot;simple model&quot;, so the ship is really making the waves -&gt; is just deleted the copylocation modifiers and animated it by keyframe.
Result:
https://youtu.be/vuQTpul-YHM
and rendered it looks like this (ok, boat was too quick ;))
https://youtu.be/musNu7EPj1Y